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14-11-2020
Mathematics

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1. In order for cos 47 to equal sin A, what must the measure of angle A be?

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jimthompson5910 jimthompson5910

14-11-2020

Answer: A = 43 degrees

Explanation:

The rule used here is

if sin(A) = cos(B), then A+B = 90.

In this case, B = 47, meaning that,

A+B = 90

A+47 = 90

A = 90-47

A = 43

Therefore,

sin(43) = cos(47)

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